Carlton ruckman Tom De Koning has undergone a procedure to remove a blood clot in his shoulder.
The 22-year-old sat out recent match simulations, but the club remains hopeful he will be ready for the beginning of the 2022 season.
The ruckman has returned to running and skills sessions, with the club taking a cautious approach with the talented youngster.
De Koning played 13 of his 22 career games last season for the Blues and will likely lead the way again in 2022.
Carlton has three ruckmen on their list including Marc Pittonet and rookie Alex Mirkov.
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